<!-- 定义模版对象 -->
<template>
    <div class="login_container">
      <div class="login_box">
        <!-- 头像区域-->
        <div class="avatar_box">
          <img src="../assets/zhoux.jpg" alt="VUE图片" />
        </div>

        <!-- 登陆表单区域
              ref代表当前表单引用对象
             :model 是表格中封装的对象
             :rules 整个表单数据进行数据校验
        -->
        <el-form ref="loginFormRef" label-width="0" class="login_form" :model="loginForm" :rules="rules"
              @submit.native.prevent>
          <el-form-item prop="username">
            <el-input  prefix-icon="iconfont iconuser" v-model="loginForm.username"></el-input>
          </el-form-item>
          <el-form-item prop="password">
            <el-input  prefix-icon="iconfont iconsuo" type="password" v-model="loginForm.password"></el-input>
          </el-form-item>
          <el-form-item class="btns">
             <el-button type="primary" size="medium" round native-type="submit" @click="login('ruleForm')">登录</el-button>
             <el-button type="info" size="medium" round @click="resetForm('ruleForm')">重置</el-button>
          </el-form-item>
        </el-form>
      </div>
    </div>
</template>

<!-- 定义JS变量 -->
<script>
export default {
  data(){
    return {
      loginForm: {
         username: '',
         password: ''
      },
     
      // 校验规则
      rules: {
         username: [
            {required: true, message: '请输入用户名', trigger: 'blur'},
            {min: 3, max: 20,message: '长度在 3 到 20 个字符之间', trigger: 'blur'}
         ],
         password: [
            {required: true, message: '请输入密码', trigger: 'blur'}
         ]
      }
    }
  },

  methods: {
     login(formName) {
             this.$refs.loginFormRef.validate(async (valid) => {
               if (valid) {
                    // 发起axjx请求，实现业务调用
                    let {data:result} =
                    await this.$http.post("/user/login",this.loginForm)
                    // 判断用户校验是否正常
                    if(result.status !== 200){
                        return this.$message.error("用户名或密码错误!")
                    }else{
                        this.$message.success("登录成功!")
                        // 获取token result.data
                        // 将用户信息保存到session中
                        window.sessionStorage.setItem("token",result.data)
                        //window.sessionStorage.removeItem("token") 删除单个
                        //window.sessionStorage.clear() //全部删除
                        // 登录成功后，跳转到/home页面中
                        this.$router.push("/home")
                    }
               } else {
                 console.log('error submit!!');
                 return false;
               }
          });
     },
     resetForm(formName) {
             //
             this.$refs.loginFormRef.resetFields();
          }
  }
}
</script>

<!-- 防止组件冲突 -->
<style lang="less" scoped>
.login_container{
  background-color: #2b4b6b;
  height: 100%;
}

.login_box {
  width: 450px;
  height: 300px;
  background-color: #FFFFFF;
  /* 设定圆弧角*/
  border-radius: 10px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #EEEEEE;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #DDDDDD; /* 添加阴影*/
    position: absolute;           /* 绝对定位*/
    left: 50%;                    /* 距离左侧50%*/
    transform: translate(-50%,-50%);   /*回调50%*/
    background-color: #FFFFFF;
    img {
      height: 100%;
      width: 100%;
      border-radius: 50%;
      background-color: #EEEEEE;
    }
  }

  .btns {
    display: flex;
    justify-content: flex-end;

  }

  .login_form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
  }
}
</style>
